BK/SC-40 Equivalent & Substitute Parts

Part Overview

The BK/SC-40 is a ceramic cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 40 A at 480 V AC and 300 V DC. This component is designed for electrical protection in industrial and commercial applications requiring slow-blow response characteristics. The part is currently active in production with full compliance certifications. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications match the original specification, ensuring direct compatibility in existing holder assemblies.

Substiute Parts

BK/SC-40

Eaton - Bussmann Electrical DivisionIn Stock: 1104BK/SC-40 Datasheet

Current PartRFQ

SC-40

Eaton - Bussmann Electrical DivisionIn Stock: 877SC-40 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/SC-40 is determined by strict equivalence across the following critical parameters:

• Current Rating: 40 A (exact match required)
• Voltage Rating - AC: 480 V (exact match required)
• Voltage Rating - DC: 300 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 100 kA AC, 10 kA DC (exact match required)
• Package / Case: Cartridge, Non-Standard (exact match required)
• Size / Dimension: 0.410" Dia x 2.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Approval Agency: CE, CSA, UL (all certifications required)

Only parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The SC-40 substitute part is a direct parametric equivalent to the BK/SC-40. Both parts are manufactured by Eaton - Bussmann Electrical Division and maintain identical electrical ratings, mechanical dimensions, and approval certifications (CE, CSA, UL). Both parts are active in production status. The RoHS compliance designation differs slightly (RoHS Compliant versus ROHS3 Compliant), with ROHS3 representing the current regulatory standard. Both parts are suitable for applications requiring 40 A protection at 480 V AC / 300 V DC with slow-blow response characteristics in non-standard cartridge holders.

Frequently Asked Questions (FAQ)

Q: Can SC-40 be used as a direct replacement for BK/SC-40?

A: Yes. The SC-40 is a parametric equivalent with identical current rating, voltage ratings, fuse type, response time, breaking capacity, physical dimensions, and approval certifications. Direct substitution is supported in existing BK/SC-40 holder assemblies.

Q: Are there any differences in RoHS compliance between these parts?

A: Both parts are RoHS compliant. The BK/SC-40 carries RoHS Compliant status, while the SC-40 carries ROHS3 Compliant status. ROHS3 represents the current regulatory standard and is fully compatible with RoHS requirements.

Q: What holder assembly is required for these fuses?

A: Both the BK/SC-40 and SC-40 require a non-standard cartridge holder assembly. The fuses are not standalone components and must be installed in an appropriate holder rated for 0.410" diameter x 2.250" length cartridges.

Q: Do these parts carry the same approval certifications?

A: Yes. Both parts carry CE, CSA, and UL approvals, meeting international and regional electrical safety standards.

Q: What is the breaking capacity of these fuses?

A: Both parts have a breaking capacity of 100 kA at rated AC voltage (480 V) and 10 kA at rated DC voltage (300 V).